Modifications:
CO 144 sts with additional thread.
Knit a few rows around.
Attach the main thread.
Knit by pattern.
Remove an additional thread and raise the opened stitches. Take a smaller size needle.
Knit around 12 rows knit, 1 row purl, 12 knit.
Raise back purl loops of the first trim row on additional needle. BO all stitches by 3-needle joining technique.